Filter.



No. 731,107, Y PATENTED 14x3 1905.

' w.-F. STEWART.

FILTER.

APPLIOA'I'ION FILED DBO. 21. 1903.

2 SHEETS-SHEET 1.

j Fig.1.

I, f 'kl I v I I I I Inventor:

- v QM;

. I V Att' orneys.

PATBNTED JAN. 31,1905. w. F; STEWART.

FILTER.

APPLICATION FILED 10180.21, 1903.

2 SHEETS-SHEET 2.

mum

' Witnesses;

lnv entbf: I.

Attorneys.

- UNITED STATES Patented. January 31, 1905.

PATENT ()FFICE.

FILTER.

' SPECIFICATION forming part of Letters Patent No. 781,107, datedJanuary 31, 1905. i i Application filed December 21, 1903. Serial F0.185,996.

T all whom it may concern.

. flowing continually while the filter is in operation, to subject thecleaner to the action of the inflowing current of .water, to clear?' thefilter-stones by the simultaneous action of a reverse current of waterthrough them and of a mechanical cleaner, to clean a plurality offilter-stones by means of a single cleaner with-I out the removal of anypart from the casing, and other objects hereinafter appearing.

My invention consists in the parts and in the arrangements andcombinations of parts hereinafter described and claimed.

In the accompanying drawings, forming a part of this specification, andwherein like symbols refer to like parts wherever they occur, Figure 1is a vertical sectional view through my improved filter. Fig. 2is ahorizontal sectional view on the line 2 2 of Fig. 1, and Fig. 3 is avertical sectional View through the cleaner-pipe.

Within a casing l a frame is revolubly' mounted. The frame consists of aspider 2,- which is provided on its lower side with a thrust-journal 3,adapted to rest in a stepbearing 4 in the casing, a hollow spider 5,consisting of pipes 6, centrally connected to a box 7, with registeringducts and a discharge-duct opening into a discharge-pipe 8, journaled ina stuffing-box 9 in the top of the casing, and a bar 10 uniting the twospiders.

Upon each arm of the frame a filter-stone 11 is mounted. The stone ispreferably a hollow cylinder. A perforated pipe 12 extends through thecenter of the stone and is screw-threaded at its ends. A.plate 13 isscrewed upon the upper end ofthe pipe 12. A second plate 14: is looselymounted on the lower end of the pipe 12. It is secured in position by anut 15, which also constitutes a journal to turn in the bearing 16 onthe lower spider 'The upper plate 13 has a gear-wheel 17 made integraltherewith and is also provided with a stufiing-box 18. A connectingpipe19 extends downwardly from the pipe 6 and is journaled in thestuifing-box 18. By

this construction the filter-stones are revolubly secured to the arms ofthe spider.

The casing 1 is provided at the top with a cover 20, removably securedin position. A stuffing-box 20 is arranged in the cover 20,

andthrough it extends a shaft 21, having a hand-wheel 22 at its upperend and a gearwheel 23 at its lower end. This gear-wheel is in thesameplane as the gear-wheels 17' and adapted to mesh with each of them. Thedischarge-pipe8 is equipped with a handwheel 24:, by means of whichthe'frame may be rotated. Thus any one of the filter-stones can bebrought into position for its gearwheel 17 to mesh with the gear-wheel23. 7

Then by manipulating the hand wheel 22 the stone may be rotated on itsaxis and may thus be cleaned by the stationary cleaner.

A connection 25 for the supply-pipe is secured in the bottom of thecasing near one side. An admission-pipe 26 registers with thisconnection and extends upwardly to a bracket 27, secured to the casingat about the height of the tops of the filter-stones. This bracketsupports and seals the upper end of. the admission-pipe, the connectionbeing such as to permit rotation of the latter in its bearings;Aplurality of connecting-pipes 28 (only one of which is shown) extendfrom the admission-pipe to a cleaner 29. The cleaner 29 consists of aslitted pipe 30, in which is secured a brush 31 with its bristlesextending through the slit. The brush preferably has a back 32 with lugs33 on the sides adapted to bear on the inner wall of the slitted pipe,and thus permit the waterto pass around it. The bristles are preferablymetallic and sufficiently thick to fill the slit in the pipe 30 Withoutchoking it. The water not only passes over the separate tufts of thebrush, but passes through them. Thus not only the exterior bristles butall the bristles are cleansed by the inflowing water. By my arrangementthe supply-stream, which is also the cleansingstream, plays upon theadvance side of the cleaner, upon which especially the material removedfrom the filter-stones tends to accumulate. Screws 34, extending throughthe pipe and bearing on the back of the brush, secure it in position.The brush is located in position to bear upon the filter-stone that isin position to be rotated. Means to adjust the pressure of the cleanerupon the stone are provided. A spring-arm 35 is secured on theadmission-pipe. An adjusting-screw 36 extends through the easing andbears upon the spring-arm 35. Thus by advancing or retracting the screwthe cleaner may be caused to bear with more or less force on thefilterstone.

The discharge-pipe 8 is provided with a stufling-box 37 at its end, andthrough it extends a fixed pipe 38 to conduct the filtered water away.At the bottom of the casing a wasteway 39 is provided, which can beopened and closed at will.

In use the casing is closed and water is admitted through theadmission-pipe 26 and is discharged therefrom through the bristles ofthe cleaner. All the water admitted must come in this way, and thus thecleaher is being continually washed off. The casing being filled withwater under the pressure of the Water-mains, water is forced through thepores of the filter-stones to the internal chambers thereof and fromthence is discharged through the pipes 6, box 7, and pipes 8 and 38.When it is desired to clean the filterstones, the wasteway is opened,and thus the pressure in the casing and external with respect to thefilter-stones is relieved. The clear water inside of the filter-stonesand the reservoir with which the filter is connected is still underpressure, however, and hence it will be forced back through thefilter-stones. Simultaneously the stone, which is connected with thegear 23, is rotated and the cleaner thus brushes the dirt and slime fromits surface. The water being still admitted through the admission-pipeand the bristles of the brush, the clogging up of the latter isprevented, for the water carries the impurities away as rapidly as theyare scraped from the stone. This filter-stone being cleaned, the frameis turned by means of the hand-wheel 24:, and the next filter-stone isbrought into such a position that its gear-wheels 17 will mesh with thegear-Wheel 23, when it can be cleaned in the same manner, and so onuntil all of the filter-stones are cleaned.

1 do not wish to be limited to the specific construction shown anddescribed, as the device is obviously capable of modification within thescope of my invention.

Although I have referred to the filtering element as a filter-stonethroughout the foregoing description and in the claims hereinafter, Iwish it to be understood that such filter-stone is the equivalent of anyconcrete filtering element, such as asbestos, carbon, cement, and thelike.

What I claim as my invention, and desire to secure by Letters Patent, is

1. Afiltercomprisinga easing, a filter-stone therein, a cleaner for saidfilter-stone, said filter-stone and cleaner being relatively movable,and means to supply a cleansing streani of water to the advance side ofsaid cleaner as a whole, whereby the matter removed from thefilter-stone is removed from the cleaner and is not permitted toaccumulate.

2. A filter comprising a casing, a supplypipe therefor, a filter-stonein said casing, and a cleaner for said filter-stone arranged to becleaned on both sides by water from the supply-pipe.

3. A filter comprising a casing, a plurality of filter-stones in saidcasing, and means to bring each of said stones into the same position tobe cleaned.

4. Afilter comprisinga casing, a filter-stone therein, a cleaner forsaid filter-stone comprising an abrasive member permeable to water.

and means to supply a cleansing stream of water to said abrasive member.

5. A filter comprisinga casing, a filter-stone therein, acleaner forsaid filter-stone com prising a brush and arranged in the path of thesupply-stream, whereby said supply-stream may flow over andthrough saidbrush longitudinally of its bristles.

6. A filtercomprisingacasing, a filter-stone therein, a cleaner for saidfilter-stone comprising a brush, and means to supply aelcansing streamof water to flow over and through said brush longitudinally of itsbristles.

7. A filter comprisingacasing, a filter-stone therein and a cleaner forsaid filter-stone consisting of a pipe having a diseharge-opening, andan abrasive member projecting through said discharge-opening in saidpipe in position to make contact with said filter stone, thesupply-stream being admitted to the casing through said cleaner-pipe andover said abrasive member.

8. A filter comprisingacasing, a filter-stone therein and a cleaner forsaid filter-stone comprising a slitted pipe, and a brush secured thereinWith the bristles thereof projecting through the slit in said pipe,thesupply-stream being admitted to the casing through said slitted pipe andover said bristles.

9. A filter comprising a casing,a filter-stone therein, a pivotedcleaner for said filter-stone, means to adjust the pressure of saidcleaner upon said filter-stone, and means to supply a cleansing streamof water to said cleaner.

10. Afiltercomprisinga casing,afilter-stone therein, a pivoted cleanerfor said filter-stone,

means to adjust the pressure of said cleaner upon said filter-stone, andmeans to supply a cleansing stream of water to said cleaner.

11, A filter comprising a casing,a filter-stone therein, and anadjustable pivoted cleaner for said filter-stonearranged to be cleanedby Water from the supply-pipe.

12. A filter comprising a casing, a filter-stone therein, a pivotedcleaner for said filter-stone arranged to bear thereon and in the pathof the supply-stream, and means to adjust the pressure of said cleaneron said filter-stone.

' 13. A filter comprisingacasing,afilter-stone therein, anadmission-pipe revolubly mounted in said casing, and a cleaner for saidfilterstone rigidly connected to said admission-pipe and arranged in thepath of the supply-stream discharged therefrom whereby said cleaner iscleansed by said supply-stream.

1a. A filter comprising a casing,a filter-stone therein, anadmission-pipe revolubly mounted therein, a cleaner for saidfilter-stone comprising a pipe having a discharge-opening and anabrasive member projecting through said discharge-opening, andconnections between said admission-pipe and said cleaner-pipe wherebythe former may discharge the supply-stream through the latter.

15. A filter comprising a casing,a filter-stone therein, anadmission-pipe revolubly mounted in said casing, adjusting means to turnsaid admission-pipe, and a cleaner for said filterstone rigidlyconnected to said admission-pipe and arranged in the path of thesupply-stream discharged therefrom.

16. A filter comprising a casing,a filter-stone therein, anadmission-pipe revolubly mounted in said casing, an arm rigidly mountedon said admission-pipe, an adjusting-screw projecting through saideasing into contact with said arm, and a cleaner for said filter-stonerigidly connected to said admission-pipe and arranged in the path of thesupply-stream discharged therefrom. I

17. A filter comprising a casing,a filter-stone therein, a fibrouscleaner for said filter-stone,

and means for forcing Water through the interstices between the fibersof said cleaner.

18. A filter comprising a casing,a filter-stone therein, and a cleanerso arrangedin the path of the supply-stream that it may be cleaned onall sides without removal from said casing.

19. A filter comprising a casing,a filter-stone therein, an admission-pipe revolubly mounted in said casing, an arm rigidly mounted on saidadmission-pipe, an adj Listing-screw projecting through said easing intocontact with said arm, and a cleaner for said filter stone rigidlymounted on said admission-pipe.

20. Afiltercomprisingacasing,afilter-stone and a cleaner thereforrelatively revolubly mounted therein, and means to revolve the revolublemember projecting through said caster-stones, and a cleaner arranged tooperate on the filter-stones geared to said shaft.

22. A filter comprising a casing, a plurality of filter-stones mountedtherein, a cleaner for said filter-stones, and means to bring any one ofsaid filter-stones and said cleaner into cooperative relation.

23. A filter comprising a casing, a plurality of filter-stones mountedtherein, a cleaner for said filter-stones, and means to bring any one ofsaid filter-stones into position to'beoperated on by saidcleaner.

24:. A filter comprising a casing, a revoluble frame therein, aplurality of' filter stones mounted on said frame, a cleaner for saidfilter-stones, and means on the exterior of said casing to revolve saidframe to bring any one of said filter-stones into position to beoperatedon by said cleaner.

25. A filter comprising a casing,aframe revolubly mounted therein, aplurality of filterstones revolubly mounted in said frame, a cleaner forsaid filter-stones, and means on the exterior of said casing to revolvesaid frame to bring any of said filter-stones into position to beoperated on by said cleaner.

26. A filter comprising a casing,a frame revolubly mounted therein, aplurality of filterstones revolubly mounted in said frame, a

cleaner for said filter-stones, and means to rotate'said filter-stonesarranged in position to be operatively connected to any one of saidfilter-stones when it is in position to be operated on by said cleaner.

27. A filter comprising a casing,a frame revolubl'y mounted therein, aplurality of filterstones revolubly mounted in said frame, a cleaner forsaid filter-stones and means to sup ply a cleansing stream of Water tosaid cleaner.

28. A filter comprising a casing, a supply-' to this specification inthe presence of two subscribing witnesses. g

' WILLIAM F. STEWART.

Witnesses:

FRED F. REISNED, J. B. MEGOWN.

